Conjugated polymers have fascinating optoelectronic properties that are unique to these semiconducting chains, and cannot be found in classical (metallic) semiconductors. Their properties, such as emission color or responsivity to external triggers can be designed and tailored by adjusting the monomer composition within the conjugated chain. Small changes in molecular structure have a drastic effect on the optical properties of these materials.
Theory predicts that not only the composition of monomers in the chain, but also their exact sequence has a huge effect. While biological polymers (proteins, DNA) have a precise and well-defined sequency, synthetic conjugated polymers to date are made with a random distribution of different monomer groups.